Description: The Lockheed Martin COMponent-BAsed Total-Ship System - 21st Century, also known as COMBATSS-21, is a combat management system developed for the US Navy's Freedom variant of the Littoral Combat Ship (LCS) based upon the Aegis combat management system. The COMBATSS-21 includes the Aegis Common Source Library (CSL) and features open architecture. COMBATSS-21 includes the radar, gun weapon system, missile launcher, decoy launcher, and electronic warfare system. In addition to the US Navy 16 Freedom-class LCSs this combat management system has also been selected for the FFG(X) class frigate.